[ONIN-092] My first time with a fuck machine. At first I was afraid, but then... the precise machine piston bit me and I was made to cum! (Censored)

Eight curious women take on the masturbation device ``Fuck Machine.'' A big dick dildo is attached to the tip of a strange mechanical device, and when you turn on the switch, it becomes a piston robot that repeats the same movements precisely! The girls apply plenty of lotion to their private parts and get ready, then gingerly insert their cyborg dicks into the meat pots. At first, the movements were slow, and then it started to feel more and more pleasurable, and then the speed of the machine gradually increased until she climaxed.